<template>
  <!-- 自定义组件 -->

  <view>

    <!-- <my-search :bacolor="'red'" :radius="8"></my-search> -->
    
      <my-search @click="gotoSearch"></my-search>
   


    <view class="scroll-view-container">

      <!-- 左侧滑动区域 -->
      <scroll-view scroll-y="true" :style="{height: wh + 'px'}" class="left-scroll-view">
        <block v-for="(item, i) in cateList" :key="i">
          <view :class="['left-scroll-item', i === active ? 'active' : '']" @click="activeChangeHandler(i)">
            {{item.cat_name}}
          </view>
        </block>

      </scroll-view>
      <!-- 右侧滑动区域 -->
      <scroll-view scroll-y="true" :style="{height: wh + 'px'}" class="right-scroll-view" :scroll-top="scrollTop">
        <!-- 二级分类的渲染 -->
        <view class="cate-lv2" v-for="(item2, i2) in cateLever2" :key="i2">
          <view class="cate-lv2-title">
            /{{item2.cat_name}}/
          </view>

          <!-- 三级商品渲染 -->
          <!-- 动态渲染三级分类的列表数据 -->
          <view class="cate-lv3-list">
            <!-- 三级分类 Item 项 -->
            <view class="cate-lv3-item" v-for="(item3, i3) in item2.children" :key="i3" @click="gotoGoodList(item3)">
              <!-- 图片 -->
              <image :src="item3.cat_icon.replace('dev','web')" mode="widthFix"></image>
              <!-- 文本 -->
              <text>{{item3.cat_name}}</text>
            </view>
          </view>

        </view>

      </scroll-view>
    </view>
  </view>


</template>

<script>
  // 导入自己封装的mixin模块
  import badgeMix from '@/mixins/tabbar-badge.js'
  
  export default {
    mixins: [badgeMix],
    data() {
      return {
        // 当前设备可用屏幕高度
        wh: 0,
        cateList: [],
        active: 0,
        // 二级分类目录
        cateLever2: [],
        scrollTop: 0
      };
    },



    onLoad() {
      const sysInfo = uni.getSystemInfoSync()
      // console.log(sysInfo)
      this.wh = sysInfo.windowHeight - 50

      this.getCateList()
    },

    methods: {
      // 获取分类列表的数据
      async getCateList() {
        const {
          data: res
        } = await uni.$http.get('/api/public/v1/categories')
        // console.log(res)
        if (res.meta.status !== 200) return uni.$showMsg()

        uni.$showMsg('请求数据成功！')

        this.cateList = res.message
        // 二级目录数据转存
        this.cateLever2 = res.message[0].children

      },

      // 一级目录点击事件
      activeChangeHandler(i) {
        this.active = i

        // 重新为二级分类的索引赋值
        this.cateLever2 = this.cateList[i].children

        this.scrollTop = this.scrollTop === 0 ? 1 : 0
      },

      // 点击三级列表，跳转到商品
      gotoGoodList(item) {
        uni.navigateTo({
          url: '/subpkg/goods_list/goods_list?cid=' + item.cat_id
        })
      },

      // 自定义组件事件
      gotoSearch() {
        // console.log('ok')
        uni.navigateTo({
          url:"/subpkg/serch/serch"
        })
      },

    }
  }
</script>

<style lang="scss">
  

  .scroll-view-container {
    display: flex;

    .left-scroll-view {
      width: 120px;

      .left-scroll-item {
        line-height: 60px;
        background-color: #f7f7f7;
        text-align: center;
        font-size: 24rpx;

        // 激活项的样式
        &.active {
          background-color: aliceblue;
          position: relative;

          // 渲染激活项左侧的红色指示边线
          &::before {
            content: ' ';
            display: block;
            width: 3px;
            height: 30px;
            background-color: #c00000;
            position: absolute;
            left: 0;
            top: 50%;
            transform: translateY(-50%);
          }

        }

      }
    }

    // 右侧滚动区域
    .cate-lv2-title {
      text-align: center;
      font-size: 12px;
      font-weight: bold;
      padding: 16rpx 0;
    }

    .cate-lv3-list {
      display: flex;
      flex-wrap: wrap;


      .cate-lv3-item {
        display: flex;
        flex-direction: column;
        width: 33.33%;
        // justify-content: center;
        align-items: center;
        margin-bottom: 10rpx;

        image {
          width: 120rpx;
        }

        text {
          font-size: 12px;
        }


      }
    }
  }
</style>
